Shaft supporting module and outer rotor type fan motor having the same

ABSTRACT

Disclosed herein is a shaft supporting module, including: a bearing rotatably supporting a shaft of a fan motor; and a supporting body supporting the bearing, wherein the bearing is formed of a single bearing extended in an axial direction.

CROSS REFERENCE TO RELATED APPLICATION

This application claims the benefit of Korean Patent Application No.10-2012-0148549 filed on Dec. 18, 2012, entitled “Shaft SupportingModule and Outer Rotor Type Fan Motor Having the Same”, which is herebyincorporated by reference in its entirety into this application.

BACKGROUND OF THE INVENTION

1. Technical Field

The present invention relates to a shaft supporting module and an outerrotor type fan motor having the same.

2. Description of the Related Art

Since an outer rotor type fan motor according to the prior art shouldinclude upper and lower bearing parts in order to support a shaft andshould assemble one by one inner components of the bearing part at thetime of assembling the fan motor, a structure thereof is complicated,many components are consumed, and high wages are required for theassembly.

In addition, at the time of using a plurality of bearing in order tosupport the shaft, it is difficult to secure concentricity of thebearing and perpendicularity of the shaft.

PRIOR ART DOCUMENT Patent Document

(Patent Document 1) Korea Patent Laid-Open Publication No. 2010-0029618

SUMMARY OF THE INVENTION

The present invention has been made in an effort to provide a shaftsupporting module capable of securing concentricity of a bearing andperpendicularity of a shaft and an outer rotor type fan motor having thesame.

Further, the present invention has been made in an effort to provide ashaft supporting module capable of being easily assembled and an outerrotor type fan motor having the same.

According to a preferred embodiment of the present invention, there isprovided a shaft supporting module, including: a bearing rotatablysupporting a shaft of a fan motor; and a supporting body supporting thebearing, wherein the bearing is formed of a single bearing extended inan axial direction.

The supporting body may include: a base part; and a bearing receivingpart extended in a direction perpendicular to one surface of the basepart and having a receiving groove formed in a shape corresponding tothe bearing.

In the bearing receiving part, the receiving groove may have a heightequal to or greater than that of the bearing.

The base part may be formed in a disk shape and the bearing receivingpart may be formed in a cylindrical shape.

The bearing may be formed of a straight bearing.

The bearing may be formed in a cylindrical shape.

According to another preferred embodiment of the present invention,there is provided an outer rotor type fan motor, including: a rotatingpart including a shaft, a fan coupled to the shaft, and a magnet mountedon the fan; and a fixed part including a bearing rotatably supportingthe shaft, a supporting body receiving and supporting the bearing, andan armature mounted so as to face the magnet, wherein the bearing isformed of a single bearing extended in an axial direction.

The armature may include: a core mounted on the supporting body; and acoil wound around the core.

The supporting body may include: a base part; and a bearing receivingpart extended in a direction perpendicular to one surface of the basepart and having a receiving groove formed in a shape corresponding tothe bearing.

In the bearing receiving part, the receiving groove may have a heightequal to or greater than that of the bearing.

The base part may be formed in a disk shape and the bearing receivingpart may be formed in a cylindrical shape.

The armature may be mounted along an outer side of the bearing receivingpart, the magnet may be mounted along an inner peripheral surface of thefan, and the magnet and the armature may be provided at a positionspaced from each other by a predetermined distance so as to face eachother.

The bearing may be formed of a straight bearing.

The bearing may be formed in a cylindrical shape.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and advantages of the presentinvention will be more clearly understood from the following detaileddescription taken in conjunction with the accompanying drawings, inwhich:

FIG. 1 is an exploded perspective view showing a shaft supporting moduleaccording to a preferred embodiment of the present invention;

FIG. 2 is a cross-sectional view showing the shaft supporting moduleaccording to the preferred embodiment of the present invention; and

FIG. 3 is a cross-sectional view showing an outer rotor type fan motorhaving the shaft supporting module according to the preferred embodimentof the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

The objects, features and advantages of the present invention will bemore clearly understood from the following detailed description of thepreferred embodiments taken in conjunction with the accompanyingdrawings. Throughout the accompanying drawings, the same referencenumerals are used to designate the same or similar components, andredundant descriptions thereof are omitted. Further, in the followingdescription, the terms “first”, “second”, “one side”, “the other side”and the like are used to differentiate a certain component from othercomponents, but the configuration of such components should not beconstrued to be limited by the terms. Further, in the description of thepresent invention, when it is determined that the detailed descriptionof the related art would obscure the gist of the present invention, thedescription thereof will be omitted.

Hereinafter, preferred embodiments of the present invention will bedescribed in detail with reference to the attached drawings.

FIG. 1 is an exploded perspective view showing a shaft supporting moduleaccording to a preferred embodiment of the present invention and FIG. 2is a cross-sectional view showing the shaft supporting module accordingto the preferred embodiment of the present invention.

Referring to FIGS. 1 and 2, a shaft supporting module 10 according to apreferred embodiment of the present invention includes a bearing 12rotatably supporting a shaft 31 and a supporting body 11 supporting thebearing 12.

More specifically, the bearing 12 rotatably supports the shaft 31 of anouter rotor type fan motor coupled to an inner peripheral surface of thebearing 12. Here, the bearing 12 has a bearing hole 12 a formed in theinner peripheral surface thereof such that the shaft 31 is coupled tothe bearing hole 12 a. In this case, the bearing 12 is formed of astraight bearing, thereby making it possible to support the shaft 31using one (a single) bearing without using an additional bearing 12.

In addition, the bearing 12 may be extended in the axial direction sothat a length thereof is 3 times or more as compared to the widththereof In this case, the bearing 12 may be formed to have the lengthwhich is 10 times or less as compared to the width of the bearing 12.Here, the bearing 12 may be formed in a cylindrical shape, but the shapeof the bearing 12 according to the preferred embodiment of the presentinvention is not limited to the cylindrical shape.

The supporting body 11 has a bearing receiving part 11 b receiving thebearing 12 formed at an upper side part thereof and a base part 11 asupporting the bearing receiving part 11 b formed at a lower side partthereof, thereby making it possible to receive and support the bearing12.

Here, the base part 11 a may be formed in a disk shape and the bearingreceiving part 11 b may be formed in a cylindrical shape. However, theshapes of the base part 11 a and the bearing receiving part 11 baccording to the preferred embodiment of the present invention are notnecessarily limited thereto.

In addition, the bearing receiving part 11 b is extended in a directionperpendicular to one surface of the base part 11 a, such that areceiving groove 11 c receiving the bearing 12 may be formed in an innerperipheral surface of the bearing receiving part 11 b. Here, thereceiving groove 11 c is formed in a shape corresponding to the shape ofthe bearing 12, thereby making it possible to receive and support thebearing 12. In this case, the receiving groove 11 c has a height equalto or greater than that of the bearing 12.

FIG. 3 is a cross-sectional view showing an outer rotor type fan motorhaving the shaft supporting module according to the preferred embodimentof the present invention.

Referring to FIG. 3, the outer rotor type fan motor 100 according to thepreferred embodiment of the present invention includes a rotating partincluding the shaft 31, a fan 32, and a magnet 33, and a fixed partincluding the bearing 12, the supporting body 11, and an armature 20.

More specifically, the fan 32 is provided at one end portion of theshaft 31 and a coupling hole or a coupling groove coupled to the shaft31 is formed at a central portion.

In addition, the fan 32 has a plurality of wings installed at an outerside thereof so as to be spaced apart from each other by a predeterminedinterval in a peripheral direction.

In addition, the fan 32 may be provided with a receiving part having alower portion opened so as to receive the magnet 33 and the armature 20.

The magnet 33 is mounted on an inner peripheral surface of the fan 32 soas to face the armature 20. Here, the magnet 33 may be mounted on aninner side of the receiving of the fan 32.

In addition, the magnet 33 and the armature 20 may be provided at aposition spaced from each other by a predetermined distance so as toface each other. In this case, the magnet 33 and the armature 20 may beinstalled at the same height.

Meanwhile, the rotating part 30 of the outer rotor type fan motor 100according the preferred embodiment of the present invention may furtherinclude a case 34 in which the magnet 33 is mounted. Here, the case 34may have an inner peripheral surface on which the magnet 33 is mountedand an outer peripheral surface mounted on the fan 32, as an example.

However, in the outer rotor type fan motor 100 according the preferredembodiment of the present invention, the shape in which the magnet 33 ismounted in the case 34 is not limited to the example, but the magnet 33may be received in the case 34, as another example. In this case, thecase 34 of another example may include a rotor core receiving the magnet33.

Referring to FIGS. 1 to 3, the bearing 12 rotatably supports the shaft31 of the outer rotor type fan motor coupled to the inner peripheralsurface of the bearing 12. Here, the bearing 12 has a bearing hole 12 aformed in the inner peripheral surface thereof; such that the shaft 31is coupled to the bearing hole 12 a. In this case, the bearing 12 isformed of a straight bearing, thereby making it possible to support theshaft 31 using one (a single) bearing without using an additionalbearing 12.

In addition, the bearing 12 may be extended in the axial direction sothat a length thereof is 3 times or more as compared to a width thereofIn this case, the bearing 12 may be formed to have the length which is10 times or less as compared to the width of the bearing 12. Here, thebearing 12 may be formed in a cylindrical shape, but the shape of thebearing 12 according to the preferred embodiment of the presentinvention is not limited to the cylindrical shape.

The supporting body 11 has a bearing receiving part 11 b receiving thebearing 12 formed at an upper side part thereof and a base part 11 asupporting the bearing receiving part 11 b formed at a lower side partthereof; thereby making it possible to receive and support the bearing12.

Here, the base part 11 a may be formed in a disk shape and the bearingreceiving part 11 b may be formed in a cylindrical shape. However, theshapes of the base part 11 a and the bearing receiving part 11 baccording to the preferred embodiment of the present invention are notnecessarily limited thereto.

In addition, the bearing receiving part 11 b is extended in a directionperpendicular to one surface of the base part 11 a, such that areceiving groove 11 c receiving the bearing 12 may be formed in an innerperipheral surface of the bearing receiving part 11 b. Here, thereceiving groove 11 c is formed in a shape corresponding to the shape ofthe bearing 12, thereby making it possible to receive and support thebearing 12. In this case, the receiving groove 11 c has a height equalto or greater than that of the bearing 12.

Referring to FIG. 3, the armature 20 includes a core 21 mounted on thesupporting body 11 and a coil 22 wound around the core 21.

Here, the core 21 is mounted on the bearing receiving part 11 b of thesupporting body 11 and may be mounted along the outer side of thebearing receiving part 11 b. Meanwhile, the core 21 may have a holeformed at the central portion thereof so as to be inserted into thebearing receiving part 11 b.

In addition, the outer rotor type fan motor 100 according to thepreferred embodiment of the present invention may further include aprinted circuit board (PCB) 40. Here, the PCB 40 may be formed in aplate shape so as to be mounted on the supporting body 11 of thesupporting part 10.

The shaft supporting module 10 and the outer rotor type fan motor 100having the shaft supporting module 10 according to the preferredembodiment of the present invention configured as described abovesupport the shaft 31 using the bearing extended in the axial directionand receive and support the bearing 12 using the supporting body 11formed in the shape corresponding to the bearing 12, thereby making itpossible to easily secure concentricity of the bearing 12 andperpendicularity of the shaft 31.

In addition, as described above, the shaft 31 may be supported by thesingle bearing 12 without adding the bearing 12 supporting the shaft 31,such that a structure may become simple and the number of components maybe decreased. As a result, wages may be decreased and a cost materialmay be decreased.

In addition, since the shaft 31 may be supported by the single bearing12, the problem that it is difficult to secure concentricity of each ofthe plurality of bearings 12 and secure perpendicularity of the shaft 31in the structure in which the shaft 31 is supported by the plurality ofbearings 12 according to the prior art may be solved.

According to the preferred embodiment of the present invention, thebearing supporting the shaft is formed of a single bearing extended inan axial direction of the shaft, such that concentricity of the bearingand perpendicularity of the shaft may be easily secured and the numberof components supporting the bearing may be decreased. In addition,costs required for the assembly may be significantly decreased andmanufacturing costs may be decreased.

Although the embodiments of the present invention have been disclosedfor illustrative purposes, it will be appreciated that the presentinvention is not limited thereto, and those skilled in the art willappreciate that various modifications, additions and substitutions arepossible, without departing from the scope and spirit of the invention.

Accordingly, any and all modifications, variations or equivalentarrangements should be considered to be within the scope of theinvention, and the detailed scope of the invention will be disclosed bythe accompanying claims.

What is claimed is:
 1. A shaft supporting module, comprising: a bearingrotatably supporting a shaft of a fan motor; and a supporting bodysupporting the bearing, wherein the bearing is formed of a singlebearing extended in an axial direction.
 2. The shaft supporting moduleas set forth in claim 1, wherein the supporting body includes: a basepart; and a bearing receiving part extended in a direction perpendicularto one surface of the base part and having a receiving groove formed ina shape corresponding to the bearing.
 3. The shaft supporting module asset forth in claim 2, wherein in the bearing receiving part, thereceiving groove has a height equal to or greater than that of thebearing.
 4. The shaft supporting module as set forth in claim 2, whereinthe base part is formed in a disk shape and the bearing receiving partis formed in a cylindrical shape.
 5. The shaft supporting module as setforth in claim 1, wherein the bearing is formed of a straight bearing.6. The shaft supporting module as set forth in claim 1, wherein thebearing is formed in a cylindrical shape.
 7. An outer rotor type fanmotor, comprising: a rotating part including a shaft, a fan coupled tothe shaft, and a magnet mounted on the fan; and a fixed part including abearing rotatably supporting the shaft, a supporting body receiving andsupporting the bearing, and an armature mounted so as to face themagnet, wherein the bearing is formed of a single bearing extended in anaxial direction.
 8. The outer rotor type fan motor as set forth in claim7, wherein the armature includes: a core mounted on the supporting body;and a coil wound around the core.
 9. The outer rotor type fan motor asset forth in claim 7, wherein the supporting body includes: a base part;and a bearing receiving part extended in a direction perpendicular toone surface of the base part and having a receiving groove formed in ashape corresponding to the bearing.
 10. The outer rotor type fan motoras set forth in claim 9, wherein in the bearing receiving part, thereceiving groove has a height equal to or greater than that of thebearing.
 11. The outer rotor type fan motor as set forth in claim 9,wherein the base part is formed in a disk shape and the bearingreceiving part is formed in a cylindrical shape.
 12. The outer rotortype fan motor as set forth in claim 9, wherein the armature is mountedalong an outer side of the bearing receiving part, the magnet is mountedalong an inner peripheral surface of the fan, and the magnet and thearmature are provided at a position spaced from each other by apredetermined distance so as to face each other.
 13. The outer rotortype fan motor as set forth in claim 7, wherein the bearing is formed ofa straight bearing.
 14. The outer rotor type fan motor as set forth inclaim 7, wherein the bearing is formed in a cylindrical shape.